Grade 5 Titanium Countersunk Screws
Grade 5 titanium countersunk screws are Ti-6Al-4V fasteners with a conical head designed to seat in a matching countersink and provide a flush finished surface. Head geometry, drive recess, thread, material properties and installation method must be defined together because the countersunk head can have reduced loadability compared with a protruding head style.
Product Specifications
| Material | Titanium Grade 5 / Ti-6Al-4V / UNS R56400 |
| Head and drive | Flat countersunk head with hex socket; cross recess, six-lobe or drawing-specific options by review |
| Dimensional references | ISO 10642 geometry, applicable ASTM F468 configuration, or customer drawing when expressly invoked |
| Threads | Metric coarse/fine, UNC, UNF or drawing-specific thread; class and gauging requirements stated by purchaser |
| Sizes | Diameter, pitch, length, thread coverage, head diameter, head angle and drive size confirmed at quotation |
| Surface condition | Cleaned and deburred; polished, coating or qualified lubricant by agreement |
| Documents | MTC, heat/lot traceability and dimensional report; mechanical testing when specified |
Availability, minimum quantity and delivery time depend on size, manufacturing route, testing and documentation. No universal stock claim or load rating is made on this page.
Standard and Drawing Notes
ISO 10642:2026 specifies metric hexagon-socket countersunk head screw characteristics for steel and stainless steel and identifies reduced loadability caused by the head design. When its geometry is requested for a titanium screw, the order must separately define Grade 5 material, mechanical requirements, manufacturing route and acceptance criteria.
ASTM F468 covers applicable nonferrous bolt and screw configurations within its stated size and product scope. The exact edition and inch or metric companion must be identified. Customer drawings should control when the countersink angle, head height, drive, thread relief, point, grip length or tolerance differs from a published product standard.
Why Choose Grade 5 Titanium?
Grade 5 Ti-6Al-4V combines high specific strength with titanium’s low density and useful corrosion resistance. It may be evaluated for aerospace fixtures, marine hardware, chemical-equipment covers, robotics, motorsport, optical instruments and premium bicycle assemblies. Final suitability depends on stress, fatigue, temperature, environment, mating materials and the governing design code.
- Higher strength than commercially pure titanium grades.
- Low weight for mass-sensitive assemblies.
- Flush head minimizes projections and interference.
- Custom dimensions can be reviewed against a controlled drawing.
Head Loadability and Countersink Fit
The drive recess removes material from the head, and a countersunk head normally has a smaller effective section than many protruding head styles. The head may govern capacity before the threaded portion reaches its full tensile capability. The mating countersink must also provide uniform contact; angular mismatch, excessive depth or poor concentricity can concentrate stress.
Design review should include tensile and shear loading, plate thickness, edge distance, fatigue, countersink geometry and installation torque. A same-size socket cap screw should not be replaced with a countersunk screw solely because the thread fits.
Galling and Assembly
Titanium threads can gall during tightening. Clean compatible threads, controlled installation speed and a qualified lubricant or coating may reduce risk. Lubrication changes friction and the preload generated by a given torque; use validated assembly data rather than a generic torque chart. Review galvanic isolation when titanium contacts dissimilar metals in seawater or another conductive environment.
Quality and Inspection Options
Inspection can include material certificate review, positive material identification when agreed, dimensional measurement, thread gauging, visual examination, surface-condition verification and mechanical testing required by the order. Traceability level and lot definition should be agreed before manufacturing.
Information Required for Quotation
- Grade 5 / Ti-6Al-4V / UNS R56400 and required material condition.
- Head/drive style and invoked standard or drawing revision.
- Thread, pitch, length, thread coverage and quantity.
- Head angle, head diameter, drive size and flushness requirement.
- Surface condition, coating/lubricant and cleanliness.
- MTC, traceability, inspection report and required testing.
Request Grade 5 Titanium Countersunk Screws
Send your standard or drawing, thread, length, head geometry, quantity and documentation requirements for manufacturing review.
Frequently Asked Questions
Can you supply drawing-specific head dimensions?
Drawing-specific geometry can be reviewed for manufacturability, quantity, tolerance and inspection requirements.
Is the countersunk head as strong as a socket cap head?
Not necessarily. Countersunk head geometry can reduce loadability, so the complete joint must be reviewed.
Are matching titanium nuts and washers available?
Matching titanium nuts and washers can be reviewed as a set, including grade, thread, bearing surface, galling control and documentation.